In the event that another studio potter ever finds this forum (when i first found it there was another potter asking about using wvo but at the time i wasn't sure and never heard back from him) i will post a link to my site that contains some info about my 70 cubic foot kiln, which is fired to 2350 F entirely on wvo. The same concept could be used to heat a residential furnace, and in fact i got most of my info from people doing just that.
I am still doing some modifications and for the next firing will replace the gravity feed system with a pump-pressure feed system, which should allow for over 400,000 btu's per hour per burner. But i have done several firings with the set up pictured in the site with no problems.
The rest of the site is still under construction but coming along.
Greasecar Kits and Products